687118146 has 64 divisors (see below), whose sum is σ = 1684730880. Its totient is φ = 183839040.

The previous prime is 687118127. The next prime is 687118153. The reversal of 687118146 is 641811786.

It is a junction number, because it is equal to n+sod(n) for n = 687118098 and 687118107.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2325 + ... + 37143.

It is an arithmetic number, because the mean of its divisors is an integer number (26323920).

Almost surely, 2^687118146 is an apocalyptic number.

687118146 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 687118146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (842365440).

687118146 is an abundant number, since it is smaller than the sum of its proper divisors (997612734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687118146 is a wasteful number, since it uses less digits than its factorization.

687118146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34871.

The product of its digits is 64512, while the sum is 42.

The square root of 687118146 is about 26212.9385227982. The cubic root of 687118146 is about 882.4236502200.

The spelling of 687118146 in words is "six hundred eighty-seven million, one hundred eighteen thousand, one hundred forty-six".